THE kTUDY ui< THE SCIENCE OF BOTANY. 
229 
the produce of three species, C. Italica , senna , and orientalis. The 
Hcematoxylon (logwood), and Swietenia (mahogany), belong to this 
class, as does the important quassia drug (Q. amara), the beautiful 
tribes of Kalmias , Rhododendron, and Andromedas, with the extensive 
genus Silene , and the beautiful Dianthus, out of which the fine carna¬ 
tions (Z). caryophyllus) , pinks, and picotees of the florist have been 
obtained. Orders five, viz. 
Monogynia ; Ormosia dasycarpa. 
Digynia ; Saxifraga ligulata. 
Trigynia ; Stellaria nemorum . 
Pentagynia ; Averrhoa bilimbi. 
Decagynia , from deka, ten, and gyne, a woman; flowers furnished 
with ten styles; Phytolacca decandra. 
Classis XI.— Dodecandria. 
Dodecandria, from dodeka , 
twelve, and aner, a man; 
signifying that this class is 
furnished with bisexual flow¬ 
ers, and from eleven to nine¬ 
teen stamens inclusive. 
This is a small incongruous 
class, containing no extensive genus of importance, except Euphorbia. 
Its orders are six, viz. 
Monogynia ; Blakea trinerva . 
Digytiia ; Agrimonia eupatoria. 
Trigynia ; Reseda odorata frutescens, tree mignonette. 
Tetragynia ; Calligonum Pallasia. 
Pentagynia ; Gastonia palmata. 
Dodecagynia , from dodeka , twelve, and gyne , a woman ; flowers 
furnished with twelve styles; Sempervivum arboreum. 
(To be continued.) 
